Bulk update feature for users is available from EUM 4.1.7212.1 onward. According to this feature, on selecting multiple users in User Search page and clicking the Edit x Users button, the User Details page for each of the selected users would load as a new tab. So for 10 users selected to bulk edit, 10 new tabs would load.
However, you might see that only one tab is loaded. In this case EUM User Search page would display a message that pop-ups must be allowed. Depending on the browser used, an pop-up blocked notification would also show up.
This can be fixed by instructing the browser to always allow pop-ups for this site.